Problem 2: (adapted from Bond, 2/e) 20 points
The following results were reported by Langmuir for the adsorption of N2 on mica:
Pressure [atm] 2.8 4.0 6.0 9.4 17.1 33.5
Amount of gas adsorbed [mm³, at 20°C, 1 atm] 12.0 15.1 19.0 23.9 28.2 33.0
(a) Plot the data to test whether the Langmuir isotherm is a good representation. If it applies, evaluate the adsorption constant.
(b) According to Bond, a maximum of ≈ 10^15 molecules typically covers 1 cm² of a surface. Use this value to estimate the surface area in Langmuir's experiment.
(c) Evaluate the adsorption constant using the equation given by Butt (see footnote in page 15 of Chapter II), and compare it to the value obtained in part (a).